Permanent retention is a friendlier default,

and easy to reconfigure per topic as they grow.

We already had that, but this branch cares about grouping such conf.
It also encourages topic defaults geared towards persistent data.

Author: solsson

kafka/10broker-config.yml

@@ -131,7 +131,7 @@ data:
     # from the end of the log.
 
     # The minimum age of a log file to be eligible for deletion due to age
-    log.retention.hours=168
+    log.retention.hours=-1
 
     # A size-based retention policy for logs. Segments are pruned from the log as long as the remaining
     # segments don't drop below log.retention.bytes. Functions independently of log.retention.hours.

kafka/50kafka.yml

@@ -60,8 +60,6 @@ spec:
         - --override
         -   zookeeper.connect=zookeeper:2181
         - --override
-        -   log.retention.hours=-1
-        - --override
         -   log.dirs=/var/lib/kafka/data/topics
         resources:
           requests: